It takes 8 seconds for a pulley system to lift a load that weights 400n to a height of 10 m. how much power is required? .

a. 400 watts.

b. 3200 watts.

c. 500 watts.

d. 80 watts

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)